Datasheet

100
XMEGA A3U [DATASHEET]
Atmel-8386D-AVR-ATxmega64A3U-128A3U-192A3U-256A3U–03/2014
36.2.11 External Reset Characteristics
Table 36-50. External reset characteristics.
36.2.12 Power-on Reset Characteristics
Table 36-51. Power-on reset characteristics.
Note: 1. V
POT-
values are only valid when BOD is disabled. When BOD is enabled V
POT-
= V
POT+
.
36.2.13 Flash and EEPROM Memory Characteristics
Table 36-52. Endurance and data retention.
Symbol Parameter Condition Min. Typ. Max. Units
t
EXT
Minimum reset pulse width 95 1000 ns
V
RST
Reset threshold voltage (V
IH
)
V
CC
= 3.0 - 3.6V 0.50*V
CC
V
V
CC
= 2.3 - 2.7V 0.40*V
CC
Reset threshold voltage (V
IL
)
V
CC
= 3.0 - 3.6V 0.50*V
CC
V
CC
= 2.3 - 2.7V 0.40*V
CC
R
RST
Reset pin Pull-up Resistor 25 k
Symbol Parameter Condition Min. Typ. Max. Units
V
POT-
(1)
POR threshold voltage falling V
CC
V
CC
falls faster than 1V/ms 0.4 1.0
V
V
CC
falls at 1V/ms or slower 0.8 1.3
V
POT+
POR threshold voltage rising V
CC
1.3 1.59 V
Symbol Parameter Condition Min. Typ. Max. Units
Flash
Write/Erase cycles
25°C 10K
Cycle
85°C 10K
Data retention
25°C 100
Year
55°C 25
EEPROM
Write/Erase cycles
25°C 80K
Cycle
85°C 30K
Data retention
25°C 100
Year
55°C 25